申論題

8. The data of the thrust of a jet-turbine engine (y), x₁=primary speed of rotation, x₂=secondary speed of rotation, and x₃=fuel flow rate are collected. It is known that all three independent variables (x) have positive effect on the dependent variable (y). The candidate regression model for the data is y = β₀+β₁x₁ + β₂x₂+ +β₃x₃. Answer the following questions based on the Excel report shown below.